我发送C2DM更新我的Andr​​oid应用程序每一个半小时，这将创建一个通知。问题是，当我早上醒来，我得到15通知排队在状态栏中。

I'm sending a C2DM update to my Android app every 1/2 hour, which creates a Notification. Problem is, when I wake up in the morning I get 15 Notifications queued up in the status bar.

我如何只保留最新的通知，覆盖previous的呢？

How do I only keep the latest notification, overwriting previous ones?

我试图寻找在C2DM的文档上（http：//$c$c.google.com/android/c2dm/），其中提到了一个名为collapse_key参数，但我无法找到如何使用它的说明，我也不是一定的解决之道在于对C2DM侧。

I tried looking at the C2DM documentation (http://code.google.com/android/c2dm/) which mentions a parameter called collapse_key, but I couldn't find an explanation for how to use it, nor am I sure the solution lies on the C2DM side.

谢谢！

推荐答案

如果您想取消任何$ P $已设置的视图pvious通知，你可以尝试设置这些标志之一。

If you want to cancel any previous notifications that has been set on the view you can try setting one of these flags.

PendingIntent.FLAG_CANCEL_CURRENT or  PendingIntent.FLAG_UPDATE_CURRENT 

这样的事情应该取代旧的通知，我相信

Something like this should replace your old notification i believe

 NotificationManager mManager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 Intent intent = new Intent(this,test.class);
 Notification notification = new Notification(R.drawable.icon, "Notify", System.currentTimeMillis());
 notification.setLatestEventInfo(this,"App Name","Description of the notification",
 PendingIntent.getActivity(this.getBaseContext(), 0, intent, PendingIntent.FLAG_CANCEL_CURRENT));
 mManager.notify(0, notification);